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Ubuntu扩展磁盘空间 - 版本历史
2026-04-21T08:50:34Z
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FC：/* 虚拟机内 */
2023-10-06T03:26:51Z
<p><span class="autocomment">虚拟机内</span></p>
<p><b>新页面</b></p><div>== 问题 ==<br />
hyper-v最初建立ubuntu虚拟机的时候分配的磁盘空间不够想安装东西报错，需要扩容，学着上面链接的作业对ubuntu下复制粘贴问题解决<br />
<br />
== 解决 ==<br />
<br />
=== hyper-v下 ===<br />
<br />
# 关闭虚拟机电源，<br />
# 编辑虚拟机磁盘<br />
# 点击扩展，<br />
# 输入扩展后大小，然后完成。<br />
<br />
=== 虚拟机内 ===<br />
和和他的需求一样直接抄一下把<syntaxhighlight lang="linux-config"><br />
检查<br />
longqiping@ubuntu:~$ df /tmp<br />
Filesystem 1K-blocks Used Available Use% Mounted on<br />
/dev/mapper/ubuntu--vg-ubuntu--lv 65019484 62892356 0 100% /<br />
发现/tmp所在的/即ubuntu--vg-ubuntu--lv的空间没有了。<br />
查看lvm卷组的信息<br />
root@ubuntu:/home/longqiping# vgdisplay<br />
--- Volume group ---<br />
VG Name ubuntu-vg<br />
System ID <br />
Format lvm2<br />
Metadata Areas 1<br />
Metadata Sequence No 2<br />
VG Access read/write<br />
VG Status resizable<br />
MAX LV 0<br />
Cur LV 1<br />
Open LV 1<br />
Max PV 0<br />
Cur PV 1<br />
Act PV 1<br />
VG Size <126.50 GiB<br />
PE Size 4.00 MiB<br />
Total PE 32383<br />
Alloc PE / Size 16192 / 63.25 GiB<br />
Free PE / Size 16191 / <63.25 GiB<br />
VG UUID 8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy<br />
<br />
解决<br />
使用命令进行磁盘扩容<br />
lvextend -L 10G /dev/mapper/ubuntu--vg-ubuntu--lv //增大或减小至19G<br />
lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv //增加10G<br />
lvreduce -L -10G /dev/mapper/ubuntu--vg-ubuntu--lv //减小10G<br />
lvresize -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv //按百分比扩<br />
使用如下命令，将/tmp增加60G<br />
root@ubuntu:/home/longqiping# lvresize -L +60G /dev/mapper/ubuntu--vg-ubuntu--lv<br />
Size of logical volume ubuntu-vg/ubuntu-lv changed from 63.25 GiB (16192 extents) to 123.25 GiB (31552 extents).<br />
Logical volume ubuntu-vg/ubuntu-lv successfully resized.<br />
扩容<br />
root@ubuntu:/home/longqiping# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv<br />
resize2fs 1.45.5 (07-Jan-2020)<br />
Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required<br />
old_desc_blocks = 8, new_desc_blocks = 16<br />
The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 32309248 (4k) blocks long.<br />
看看效果<br />
root@ubuntu:/home/longqiping# vgdisplay<br />
--- Volume group ---<br />
VG Name ubuntu-vg<br />
System ID <br />
Format lvm2<br />
Metadata Areas 1<br />
Metadata Sequence No 3<br />
VG Access read/write<br />
VG Status resizable<br />
MAX LV 0<br />
Cur LV 1<br />
Open LV 1<br />
Max PV 0<br />
Cur PV 1<br />
Act PV 1<br />
VG Size <126.50 GiB<br />
PE Size 4.00 MiB<br />
Total PE 32383<br />
Alloc PE / Size 31552 / 123.25 GiB<br />
Free PE / Size 831 / <3.25 GiB<br />
VG UUID 8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy<br />
<br />
root@ubuntu:/home/longqiping# df -h<br />
Filesystem Size Used Avail Use% Mounted on<br />
udev 16G 0 16G 0% /dev<br />
tmpfs 3.2G 1.5M 3.2G 1% /run<br />
/dev/mapper/ubuntu--vg-ubuntu--lv 122G 61G 56G 52% /<br />
tmpfs 16G 0 16G 0% /dev/shm<br />
tmpfs 5.0M 0 5.0M 0% /run/lock<br />
tmpfs 16G 0 16G 0% /sys/fs/cgroup<br />
/dev/vda2 976M 396M 514M 44% /boot<br />
/dev/loop0 49M 49M 0 100% /snap/core18/1883<br />
/dev/vda1 511M 3.5M 508M 1% /boot/efi<br />
/dev/loop1 49M 49M 0 100% /snap/core18/1990<br />
/dev/loop2 27M 27M 0 100% /snap/snapd/11043<br />
/dev/loop3 29M 29M 0 100% /snap/snapd/11115<br />
/dev/loop5 62M 62M 0 100% /snap/lxd/19206<br />
/dev/loop4 63M 63M 0 100% /snap/lxd/19648<br />
tmpfs 3.2G 0 3.2G 0% /run/user/1000<br />
<br />
</syntaxhighlight>[https://zhuanlan.zhihu.com/p/359959580 抄自]<br />
[[分类:Ubuntu]]<br />
[[分类:Hyper-v]]</div>
FC